Method for preparing high specific surface area activated carbon through rapid activation under fluidization
a technology of activated carbon and rapid activation, which is applied in the field of preparing activated carbon, can solve the problems of long operation time, slow pyrolysis generally takes relatively long time, and the preparation of activated carbon, and achieves short activation time, facilitate material feeding and discharging, and guarantee the graininess of the material
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embodiment 1
[0032]The present embodiment comprises: mixing 85% of phosphoric acid with the materials of pine wood chips for immersing the materials, wherein the particle size of the materials is 0.56-0.9 mm and the mass ratios of the phosphoric acid to the materials are 1:1, 2:1 and 3:1; soaking at room temperature for 3 h; then drying the materials in a constant-temperature drying oven of 105° C. for 10 h; and then stirring the materials into granular materials. Activation is conducted in a spouted bed reactor and the activation temperature is 800° C. After the spouted bed reactor is heated to 800° C., fluidized gas (nitrogen) is introduced. When the immersing ratios (H3PO4 / pine wood chips) are 1:1, 2:1 and 3:1, the fluidized gas flow rates of the fluidized gas are respectively 0.7 m3 / h, 1.5 m3 / h and 1.9 m3 / h. 10 g of granular material is put into the spouted bed reactor, and 20 g of quartz sand is put into the spouted bed reactor. Activation is conducted for 1-10 min. After activation is ende...
embodiment 2
[0035]The present embodiment comprises: mixing 85% of phosphoric acid with the materials of walnut shells for immersing the materials, wherein the particle size of the materials is 0.4-0.8 mm and the mass ratios of the phosphoric acid to the materials are 1.5:1 and 2:1; soaking at room temperature for 3 h; then drying the materials in a constant-temperature drying oven of 105° C. for 10 h; and then stirring the materials into granular materials. Activation is conducted in a spouted bed reactor and the activation temperature is 800′C. After the spouted bed reactor is heated to 800° C., fluidized gas (nitrogen) is introduced. When the immersing ratios (H3PO4 / walnut shells) are 1.5:1 and 2:1, the fluidized gas flow rate of the fluidized gas is 1.5 m3 / h. 20 g of quartz sand is put, and 10 g of materials is put into the spouted bed reactor. Activation is conducted for 5 min. After activation is ended, the materials are washed in warm water of 80° C. until the PH is neutral.
[0036]The foll...
embodiment 3
[0037]The present embodiment comprises: mixing 85% of phosphoric acid with the materials of wheat straws for immersing the materials, wherein the particle size of the materials is 0.56-0.9 mm and the immersing mass ratios of the phosphoric acid to the wheat straws are 1:1 and 2:1; soaking at room temperature for 3 h; then drying the materials in a constant-temperature drying oven of 105° C. for 10 h; and then stirring the materials into granular materials. Activation is conducted in a spouted bed reactor and the activation temperature is 800° C. Firstly, the spouted bed reactor is heated to 800° C., and then fluidized gas (nitrogen or carbon dioxide) is introduced. When the immersing ratios (H3PO4 / wheat straws) are 1:1 and 2:1, the fluidized gas flow rates of the fluidized gas are respectively 0.7 m3 / h and 1.5 m3 / h. 30 g of quartz sand is put, and 10 g of materials is put into the spouted bed reactor. Activation is conducted for 5 min. After activation is ended, the materials are ra...
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Abstract
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